Yea, I think that Greinke (or anyone) could have said "Sorry that pitch got away from me, are you okay?" and he STILL would have charged the mound. I think after a batter takes something like two steps towards the mound they have crossed the point of no return, they are going to go to the mound unless the catcher tackles them first.

First base is "on the way to the mound" at least roughly.

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